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Finding the Fourth Proportional to 479.44, 719.24 and 478.88

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Solution

The fourth proportional to 479.44, 719.24 and 478.88 is: 718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.44 : 719.24 = 478.88 : x
  2. Step 2: Convert to fraction form
    479.44/719.24 = 478.88/x
  3. Step 3: Cross multiply
    479.44x = 719.24 × 478.88
  4. Step 4: Simplify right side
    479.44x = 344,429.65
  5. Step 5: Solve for x
    x = 344,429.65/479.44
  6. Step 6: Final answer
    x = 718.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.